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This study was found by Terraformer and posted in the forum in late 2024/early 2025
This work addresses a concern for those planning deep space missions using rotation to provide artificial gravity.
The study provides support for the idea that humans can be "trained" to deal with high levels of rotation, provided that the rate of rotation is increased slowly over a period of days.
https://pmc.ncbi.nlm.nih.gov/articles/PMC7450067/
NPJ Microgravity. 2020 Aug 26;6:22. doi: 10.1038/s41526-020-00112-w
Improved feasibility of astronaut short-radius artificial gravity through a 50-day incremental, personalized, vestibular acclimation protocol
Kathrine N Bretl 1,✉, Torin K Clark 1
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PMCID: PMC7450067 PMID: 32885040
Abstract
The “Coriolis” cross-coupled (CC) illusion has historically limited the tolerability of utilizing fast-spin rate, short-radius centrifugation for in-flight artificial gravity. Previous research confirms that humans acclimate to the CC illusion over 10 daily sessions, though the efficacy of additional training is unknown. We investigated human acclimation to the CC illusion over up to 50 daily sessions of personalized, incremental training. During each 25-min session, subjects spun in yaw and performed roll head tilts approximately every 30 s, reporting the presence or absence of the illusion while rating motion sickness every 5 min. Illusion intensity was modulated by altering spin rate based upon subject response, such that the administered stimulus remained near each individual’s instantaneous illusion threshold. Every subject (n = 11) continued to acclimate linearly to the CC illusion during the investigation. Subjects acclimated at an average rate of 1.17 RPM per session (95% CI: 0.63–1.71 RPM per session), with the average tolerable spin rate increasing from 1.4 to 26.2 RPM, corresponding to a reduction in required centrifuge radius from 456.6 to 1.3 m (to produce loading of 1 g at the feet). Subjects reported no more than slight motion sickness throughout their training (mean: 0.92/20, 95% CI: 0.35–1.49/20). We applied survival analysis to determine the probability of individuals reaching various spin rates over a number of training days, providing a tolerability trade parameter for centrifuge design. Results indicate that acclimation to a given, operationally relevant spin rate may be feasible for all subjects if given a sufficient training duration.Subject terms: Aerospace engineering, Biological sciences
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